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Title: Titanium monoxide spectroscopy following laser-induced optical breakdown

Abstract

This work investigates Titanium Monoxide (TiO) in ablation-plasma by employing laser-induced breakdown spectroscopy (LIBS) with 1 to 10 TW/cm{sup 2} irradiance, pulsed, 13 nanosecond, Q-switched Nd:YAG laser radiation at the fundamental wavelength of 1064 nm. The analysis of TiO is based on our first accurate determination of transition line strengths for selected TiO A-X, B-X, and E-X transitions, particularly TiO A-X {gamma} and B-X {gamma} Prime bands. Electric dipole line strengths for the A{sup 3}{Phi}-X{sup 3}{delta} and B{sup 3}{Pi}-X{sup 3}{delta} bands of TiO are computed. The molecular TiO spectra are observed subsequent to laser-induced breakdown (LIB). We discuss analysis of diatomic molecular spectra that may occur simultaneously with spectra originating from atomic species. Gated detection is applied to investigate the development in time of the emission spectra following LIB. Collected emission spectra allow one to infer micro-plasma parameters such as temperature and electron density. Insight into the state of the micro-plasma is gained by comparing measurements with predictions of atomic and molecular spectra. Nonlinear fitting of recorded and computed diatomic spectra provides the basis for molecular diagnostics, while atomic species may overlap and are simultaneously identified. Molecular diagnostic approaches similar to TiO have been performed for diatomic molecules such asmore » AlO, C{sub 2}, CN, CH, N{sub 2}, NH, NO and OH.« less

Authors:
; ; ; ;  [1]
  1. The University of Tennessee/UT Space Institute, Center for Laser Applications, 411 B.H. Goethert Parkway, Tullahoma, TN 37388-9700 (United States)
Publication Date:
OSTI Identifier:
22069152
Resource Type:
Journal Article
Journal Name:
AIP Conference Proceedings
Additional Journal Information:
Journal Volume: 1464; Journal Issue: 1; Conference: International symposium on high power laser ablation 2012, Santa Fe, NM (United States), 30 Apr - 3 May 2012; Other Information: (c) 2012 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 0094-243X
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY; 36 MATERIALS SCIENCE; 74 ATOMIC AND MOLECULAR PHYSICS; ABLATION; BREAKDOWN; CARBON NITRIDES; ELECTRIC DIPOLES; ELECTRON DENSITY; ELECTRON TEMPERATURE; EMISSION SPECTRA; INFRARED SPECTRA; ION TEMPERATURE; LASER RADIATION; LASER SPECTROSCOPY; LASER-PRODUCED PLASMA; NEODYMIUM LASERS; NITRIC OXIDE; NONLINEAR PROBLEMS; PLASMA DENSITY; Q-SWITCHING; RADIANT FLUX DENSITY; TITANIUM OXIDES

Citation Formats

Parigger, Christian G, Woods, Alexander C, Keszler, Anna, Nemes, Laszlo, Hornkohl, James O, Chemical Research Center of the Hungarian Academy of Sciences, Institute of Materials and Environmental Chemistry, Pusztaszeri ut 59-67, H-1025 Budapest, Chemical Research Center of the Hungarian Academy of Sciences, Laser Spectroscopy Laboratory, Pusztaszeri ut 59-67, H-1025 Budapest, and Hornkohl Consulting, Tullahoma, TN 37388. Titanium monoxide spectroscopy following laser-induced optical breakdown. United States: N. p., 2012. Web. doi:10.1063/1.4739915.
Parigger, Christian G, Woods, Alexander C, Keszler, Anna, Nemes, Laszlo, Hornkohl, James O, Chemical Research Center of the Hungarian Academy of Sciences, Institute of Materials and Environmental Chemistry, Pusztaszeri ut 59-67, H-1025 Budapest, Chemical Research Center of the Hungarian Academy of Sciences, Laser Spectroscopy Laboratory, Pusztaszeri ut 59-67, H-1025 Budapest, & Hornkohl Consulting, Tullahoma, TN 37388. Titanium monoxide spectroscopy following laser-induced optical breakdown. United States. doi:10.1063/1.4739915.
Parigger, Christian G, Woods, Alexander C, Keszler, Anna, Nemes, Laszlo, Hornkohl, James O, Chemical Research Center of the Hungarian Academy of Sciences, Institute of Materials and Environmental Chemistry, Pusztaszeri ut 59-67, H-1025 Budapest, Chemical Research Center of the Hungarian Academy of Sciences, Laser Spectroscopy Laboratory, Pusztaszeri ut 59-67, H-1025 Budapest, and Hornkohl Consulting, Tullahoma, TN 37388. Mon . "Titanium monoxide spectroscopy following laser-induced optical breakdown". United States. doi:10.1063/1.4739915.
@article{osti_22069152,
title = {Titanium monoxide spectroscopy following laser-induced optical breakdown},
author = {Parigger, Christian G and Woods, Alexander C and Keszler, Anna and Nemes, Laszlo and Hornkohl, James O and Chemical Research Center of the Hungarian Academy of Sciences, Institute of Materials and Environmental Chemistry, Pusztaszeri ut 59-67, H-1025 Budapest and Chemical Research Center of the Hungarian Academy of Sciences, Laser Spectroscopy Laboratory, Pusztaszeri ut 59-67, H-1025 Budapest and Hornkohl Consulting, Tullahoma, TN 37388},
abstractNote = {This work investigates Titanium Monoxide (TiO) in ablation-plasma by employing laser-induced breakdown spectroscopy (LIBS) with 1 to 10 TW/cm{sup 2} irradiance, pulsed, 13 nanosecond, Q-switched Nd:YAG laser radiation at the fundamental wavelength of 1064 nm. The analysis of TiO is based on our first accurate determination of transition line strengths for selected TiO A-X, B-X, and E-X transitions, particularly TiO A-X {gamma} and B-X {gamma} Prime bands. Electric dipole line strengths for the A{sup 3}{Phi}-X{sup 3}{delta} and B{sup 3}{Pi}-X{sup 3}{delta} bands of TiO are computed. The molecular TiO spectra are observed subsequent to laser-induced breakdown (LIB). We discuss analysis of diatomic molecular spectra that may occur simultaneously with spectra originating from atomic species. Gated detection is applied to investigate the development in time of the emission spectra following LIB. Collected emission spectra allow one to infer micro-plasma parameters such as temperature and electron density. Insight into the state of the micro-plasma is gained by comparing measurements with predictions of atomic and molecular spectra. Nonlinear fitting of recorded and computed diatomic spectra provides the basis for molecular diagnostics, while atomic species may overlap and are simultaneously identified. Molecular diagnostic approaches similar to TiO have been performed for diatomic molecules such as AlO, C{sub 2}, CN, CH, N{sub 2}, NH, NO and OH.},
doi = {10.1063/1.4739915},
journal = {AIP Conference Proceedings},
issn = {0094-243X},
number = 1,
volume = 1464,
place = {United States},
year = {2012},
month = {7}
}